Private School Review - Established 2003
Wilbraham & Monson Academy Top 8 · Oldest Founding Date (MA)
Fay School Top 21 · Oldest Founding Date (MA)
Miss Hall's School Top 12 · Most AP Courses (MA)

Average Private High School Endowment in Massachusetts

The average private high school endowment in Massachusetts is $121.5M (2026-27).
The private high school in Massachusetts with the highest endowment is Phillips Academy Andover, with a endowment of $1326M.

Quick Facts (26-27)

  • # MA Schools Ranked: 41
  • Top 20 Range (Endowment): $57M–$1,326M
  • MA School Avg.: $135M
  • National School Avg.: $30M

Quick Facts (26-27)

  • # MA Schools Ranked: 41
  • Top 20 Range (Endowment): $57M–$1,326M
  • MA School Avg.: $135M
  • National School Avg.: $30M

Massachusetts Average Endowment (Trends)

Total Growth: (-11.4%) (-$16.1 million since 2017)

Year National avg Massachusetts (MA) avg YoY Change ($) YoY Change (%)
2025 $51 million $125.5 million ▼ -$6.8 million ▼ -5.2%
2024 $52 million $132.3 million ▲ +$3.3 million ▲ +2.5%
2023 $51 million $129.0 million ▲ +$3.6 million ▲ +2.9%
2022 $52 million $125.4 million ▼ -$2.1 million ▼ -1.6%
2021 $52 million $127.5 million ▲ +$5.6 million ▲ +4.6%
2020 $51 million $121.9 million ▼ -$8.2 million ▼ -6.3%
2019 $53 million $130.2 million ▼ -$11.9 million ▼ -8.4%
2018 $55 million $142.1 million ▲ +$0.4 million ▲ +0.3%
2017 $57 million $141.6 million — —
Download Table: Download as CSV | Download as XML | Download as JSON

Source: National Center for Education Statistics (NCES) Private School Universe Survey (PSS), direct school submissions, and proprietary website research and analysis by Private School Review.

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Show school map — Massachusetts (endowment range: $57M–$1,326M, avg $135M)
Endowment Range: $10M $1326M Avg. Endowment: $156.9M

Average Private High School Endowment in Massachusetts (2026-27)

Showing 41 schools
Phillips Academy Andover Photo
#1Phillips Academy Andover
Gr: 9-12 | 1,154 students
Avg. class size: 13 students
Sports: 25 | Extracurriculars: 54
180 Main Street
Andover, MA 01810
(978) 749-4050
(1)
$1,326endowment
View Profile
Deerfield Academy Photo
#2Deerfield Academy
Gr: 9-12 | 651 students
Avg. class size: 12 students
Sports: 24 | Extracurriculars: 44
7 Boyden Lane
Deerfield, MA 01342
(413) 774-1400
$920endowment
View Profile
Groton School Photo
#3Groton School
Gr: 8-12 | 379 students
Avg. class size: 11 students
Sports: 14
Episcopal
282 Farmers Row
Groton, MA 01450
(978) 448-3363
$611endowment
View Profile
Milton Academy Photo
#4Milton Academy
Gr: K-12 | 1,020 students
Avg. class size: 14 students
Sports: 19 | Extracurriculars: 56
170 Centre Street
Milton, MA 02186
(617) 898-1798
$408endowment
View Profile
Middlesex School Photo
#5Middlesex School
Gr: 9-12 | 429 students
Avg. class size: 12 students
Sports: 20 | Extracurriculars: 71
1400 Lowell Road
Concord, MA 01742
(978) 371-6524
$326endowment
View Profile
Berkshire School Photo
#6Berkshire School
Gr: 9-12 | 409 students
Avg. class size: 12 students
Sports: 20 | Extracurriculars: 2
245 North Undermountain Road
Sheffield, MA 01257
(413) 229-1003
(1)
$195endowment
View Profile
Northfield Mount Hermon Photo
#7Northfield Mount Hermon
Gr: 9-12 | 630 students
Avg. class size: 13 students
Sports: 23 | Extracurriculars: 43
One Lamplighter Way
Gill, MA 01354
(413) 498-3227
(2)
$185endowment
View Profile
Belmont Hill School Photo
#8Belmont Hill School
Gr: 7-12 | 471 students
Avg. class size: 11 students
Sports: 16
All-boys
350 Prospect Street
Belmont, MA 02478
(617) 993-5220
$172endowment
View Profile
St. Mark's School Photo
#9St. Mark's School
Gr: 9-12 | 383 students
Avg. class size: 11 students
Sports: 15 | Extracurriculars: 74
Episcopal
25 Marlboro Road
Southborough, MA 01772
(508) 786-6000
(2)
$150endowment
View Profile
Dana Hall School Photo
#10Dana Hall School
Gr: 5-12 | 441 students
Avg. class size: 12 students
Sports: 16 | Extracurriculars: 36
All-girls
45 Dana Road
Wellesley, MA 02482
(781) 489-1331
(1)
$120endowment
View Profile
The Governors Academy Photo
#11The Governors Academy
Gr: 9-12 | 405 students
Avg. class size: 11 students
Sports: 17
1 Elm St
Byfield, MA 01922
(978) 465-1763
(1)
$110endowment
View Profile
Brooks School Photo
#12Brooks School
Gr: 9-12 | 351 students
Avg. class size: 12 students
Sports: 16 | Extracurriculars: 28
Episcopal
1160 Great Pond Road
North Andover, MA 01845
(978) 725-6255
$102endowment
View Profile
Concord Academy Photo
#13Concord Academy
Gr: 9-12 | 431 students
Avg. class size: 12 students
Sports: 17 | Extracurriculars: 115
166 Main Street
Concord, MA 01742
(978) 402-2250
$95endowment
View Profile
The Williston Northampton School Photo
#14The Williston Northampton School
Gr: 7-12 | 490 students
Avg. class size: 12 students
Sports: 23 | Extracurriculars: 24
19 Payson Avenue
Easthampton, MA 01027
(413) 529-3231
(1)
$67endowment
View Profile
The Fessenden School Photo
#15The Fessenden School
Gr: PK-9 | 550 students
Avg. class size: 12 students
Sports: 18 | Extracurriculars: 15
All-boys
250 Waltham Street
West Newton, MA 02465
(617) 630-2300
$65endowment
View Profile
Tabor Academy Photo
#16Tabor Academy
Gr: 9-12 | 508 students
Avg. class size: 12 students
Sports: 16 | Extracurriculars: 72
246 Front Street
Marion, MA 02738
(508) 291-8300
(7)
$63endowment
View Profile
Cathedral High School Photo
#17(T17–T18)Cathedral High School
Gr: 7-12 | 287 students
Sports: 9 | Extracurriculars: 9
Catholic
74 Union Park St
Boston, MA 02118
(617) 542-2325
$60endowment
View Profile
Worcester Academy Photo
#17(T17–T18)Worcester Academy
Gr: 6-12 | 502 students
Avg. class size: 14 students
Sports: 19
81 Providence Street
Worcester, MA 01604
(508) 754-5302
$60endowment
View Profile
Fay School Photo
#19Fay School
Gr: K-9
Avg. class size: 14 students
Sports: 16 | Extracurriculars: 14
48 Main Street
Southborough, MA 01772
(508) 490-8201
(9)
$59endowment
View Profile
St. John's Preparatory School Photo
#20St. John's Preparatory School
Gr: 6-12 | 1,430 students
Avg. class size: 18 students
Sports: 26 | Extracurriculars: 61
All-boys (Catholic)
72 Spring Street
Danvers, MA 01923
(978) 624-1301
(5)
$57endowment
View Profile
Lawrence Academy Photo
#21Lawrence Academy
Gr: 9-12 | 379 students
Avg. class size: 13 students
Sports: 21 | Extracurriculars: 32
26 Powderhouse Rd
Groton, MA 01450
(978) 448-1530
(1)
$50endowment
View Profile
The Rivers School Photo
#22The Rivers School
Gr: 6-12 | 519 students
Avg. class size: 12 students
Sports: 16 | Extracurriculars: 24
333 Winter St
Weston, MA 02493
(781) 235-9300
(3)
$49endowment
View Profile
Carroll School Photo
#23Carroll School
Gr: 1-9 | 447 students
Avg. class size: 7 students
Sports: 9 | Extracurriculars: 8
Special Education School
25 Baker Bridge Road
Lincoln, MA 01773
(781) 259-8342
(2)
$33endowment
View Profile
The Winchendon School Photo
#24The Winchendon School
Gr: 9-12 | 230 students
Avg. class size: 8 students
Sports: 11 | Extracurriculars: 14
172 Ash Street
Winchendon, MA 01475
(978) 297-1223
(3)
$30endowment
View Profile
Miss Hall's School Photo
#25Miss Hall's School
Gr: 9-12 | 200 students
Avg. class size: 11 students
Sports: 14 | Extracurriculars: 55
All-girls | Specialized Curriculum
492 Holmes Road
Pittsfield, MA 01201
(413) 499-1300
(11)
$29endowment
View Profile
Commonwealth School Photo
#26Commonwealth School
Gr: 9-12 | 164 students
Avg. class size: 9 students
Sports: 9 | Extracurriculars: 45
151 Commonwealth Avenue
Boston, MA 02116
(617) 266-7525
(1)
$22endowment
View Profile
Falmouth Academy Photo
#27Falmouth Academy
Gr: 7-12 | 180 students
Avg. class size: 12 students
Sports: 6 | Extracurriculars: 31
7 Highfield Dr.
Falmouth, MA 02540
(508) 457-9696
$20endowment
View Profile
Walnut Hill School For The Arts Photo
#28Walnut Hill School For The Arts
Gr: 9-12 | 277 students
Sports: 2 | Extracurriculars: 6
12 Highland Street
Natick, MA 01760
(508) 650-5085
$16endowment
View Profile
Landmark High School Photo
#29Landmark High School
Gr: 2-12 | 316 students
Avg. class size: 7 students
Sports: 17 | Extracurriculars: 3
Special Education School
429 Hale St
Prides Crossing, MA 01965
(978) 236-3010
(2)
$15endowment
View Profile
The Cambridge School Of Weston Photo
#30(T30–T31)The Cambridge School Of Weston
Gr: 9-12 | 310 students
Avg. class size: 13 students
Sports: 11 | Extracurriculars: 53
45 Georgian Road
Weston, MA 02493
(781) 642-8650
(2)
$14endowment
View Profile
The Pike School Photo
#30(T30–T31)The Pike School
Gr: PK-9 | 400 students
Avg. class size: 10 students
Sports: 8 | Extracurriculars: 15
34 Sunset Rock Road
Andover, MA 01810
(978) 475-1197
(1)
$14endowment
View Profile
Riverview School Inc Photo
#32Riverview School Inc
Gr: 6-12 | 208 students
Avg. class size: 8 students
Sports: 26 | Extracurriculars: 7
Special Education School
551 Route 6A
East Sandwich, MA 02537
(508) 888-0489
$14endowment
View Profile
The Bement School Photo
#33(T33–T34)The Bement School
Gr: K-9 | 224 students
Avg. class size: 12 students
Sports: 17 | Extracurriculars: 15
94 Old Main St
Deerfield, MA 01342
(413) 774-7061
(15)
$12endowment
View Profile
Wilbraham & Monson Academy Photo
#33(T33–T34)Wilbraham & Monson Academy
Gr: 6-12 | 412 students
Avg. class size: 12 students
Sports: 20 | Extracurriculars: 32
423 Main Street
Wilbraham, MA 01095
(413) 596-6811
(4)
$12endowment
View Profile
St. Bernard's High School Photo
#35St. Bernard's High School
Gr: 9-12
Avg. class size: 16 students
Sports: 11 | Extracurriculars: 15
Catholic
45 Harvard Street
Fitchburg, MA 01420
(978) 342-3212
(2)
$10endowment
View Profile
Show 6 more private schools in Massachusetts (out of 41 total schools)
Loading...

Frequently Asked Questions

What is the Massachusetts average private high schools endowment?
The Massachusetts average private high schools endowment is $121.5M for 2026-27.
What are the private high schools with the highest endowment in Massachusetts?
The top ranked private high schools in Massachusetts include Phillips Academy Andover, Deerfield Academy and Groton School.

Recent Articles

Can Private Schools Raise Fees After You Sign?
Can Private Schools Raise Fees After You Sign?
Can private schools increase mandatory fees after enrollment contracts are signed? Learn how contract terms, fee disclosures, state laws, and parent rights affect unexpected charges and available options.
Financial Aid When a Sibling Graduates Private School
Financial Aid When a Sibling Graduates Private School
Learn how private school financial aid may change when an older sibling graduates, including revised family contributions, sibling discounts, college expenses, renewal decisions, and practical steps to protect affordability.
Private School Expansion: Preserving School Culture
Private School Expansion: Preserving School Culture
Discover how growing private schools can expand enrollment while preserving small classes, personal attention, strong relationships, and school culture, plus essential questions parents should ask before choosing a school.

Quick Links

SCHOOL SEARCH TOOLS:
SCHOOL BY TYPE (MA):
OPEN-HOUSES & JOBS:
PUBLIC & BOARDING SCHOOLS:
PRIVATE SCHOOL DATA:

Most Popular Articles

The Pros and Cons of Private School in 2026
The Pros and Cons of Private School in 2026
 Private School vs Public School: Key Differences (2026 Guide)
Private School vs Public School: Key Differences (2026 Guide)
School Rankings by Category
School Rankings by Category

More Articles

Getting into Private School
High School
Running a Private School
Archives
Pre-school